ST defect fixes and review comments fixes

Change-Id: Ib8c56a88c19cd9aa23918d0f9e37c89e74cb0d13
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaIdentifierSyntax.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaIdentifierSyntax.java
index dd543ca..2f79931 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaIdentifierSyntax.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaIdentifierSyntax.java
@@ -31,7 +31,6 @@
     private static final int INDEX_ZERO = 0;
     private static final int INDEX_ONE = 1;
     private static final int INDEX_TWO = 2;
-    private static final int INDEX_THREE = 3;
 
     /**
      * Default constructor.
@@ -100,9 +99,7 @@
         String[] revisionArr = date.split(UtilConstants.HYPHEN);
 
         String rev = "rev";
-        String year = revisionArr[INDEX_ZERO];
-        char[] yearBytes = year.toCharArray();
-        rev = rev + yearBytes[INDEX_TWO] + yearBytes[INDEX_THREE];
+        rev = rev + revisionArr[INDEX_ZERO];
 
         if ((Integer.parseInt(revisionArr[INDEX_ONE]) <= MAX_MONTHS)
                 && Integer.parseInt(revisionArr[INDEX_TWO]) <= MAX_DAYS) {